veyron/runtimes/google/rt/sectransition: use ListenX.

Change-Id: Ic86af9a7836e849ee982b7831a43b7f63cb4f251
diff --git a/runtimes/google/rt/sectransition/sectransition.go b/runtimes/google/rt/sectransition/sectransition.go
index d5293c3..536f0f1 100644
--- a/runtimes/google/rt/sectransition/sectransition.go
+++ b/runtimes/google/rt/sectransition/sectransition.go
@@ -7,7 +7,7 @@
 	"time"
 
 	"veyron.io/veyron/veyron/lib/signals"
-	_ "veyron.io/veyron/veyron/profiles"
+	"veyron.io/veyron/veyron/profiles"
 
 	"veyron.io/veyron/veyron2/ipc"
 	"veyron.io/veyron/veyron2/naming"
@@ -48,7 +48,7 @@
 	}
 	defer server.Stop()
 
-	ep, err := server.Listen("tcp", "127.0.0.1:0")
+	ep, err := server.ListenX(profiles.LocalListenSpec)
 	if err != nil {
 		vlog.Fatal(err)
 	}